Stirrup-hammer



M. F. WILLIAMS.

STIHRUP HAMMER.

APPLlcATloN FILED MAYH, 191s.

Patented Nov. 15, 1921.

,new m mg Ww QM w NTED STATES rarest MILTN F. WILLIAMS, OF ST. LOUIS., MISSOURI, ASSIGNOR TO WILLAMS ,PATENT CRUSHER AND PULVERIZER COMPANY, OF ST'. LOUIES, MISSOURI, A CORPORA- 'non or MISSOURI.

STIRR''P-HAMMER.

Application filed May 17,

T0 all whom t may concern.'

Be it known that I, MILTON F. VILLrAMs, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements' in Stirrup-Hammers, of which the following is a specification.

rl.`liis invention relates to certain new and useful improvements in stirrup hammers the peculiarities of which will be hereinafter described and claimed.

The object of my invention is to provide a pivoted stirrup hammer of simple and effective form having a cross bar head of comparatively small radial thickness adapted to pass through the feed material and presenting a wide working edge operating practically with minimum o-utlay of power.

In reducing rough feed stuff to coarse meal the cross bar head may have a sharp edge for corn stalks, etc., or may be comparatively dull as when made from a flat bar with ends bent down to form arms; but for this class of feed mill the rough stuff is more readilyl drawn into the hopper and reduced to coarse particles, by a head extending half or all the width of the casing and of thin dimension radially rather than tliick,-the object with this hammer not being to pulverize, but to beat and cut up coarsely the feed material.

Referring to the accompanying` drawing on which like reference letters indicate corresponding parts, Figure l represents a vertical sectional elevation of a grinder embodying my improvement, the section being taken across the axle; Fig. 2 a similar sectional view on the line X of Fig. l, with the section parallel to said axle; and Fig. 3 a detailed view of the preferred simple form of stirrup hammer when operating on feed material that is to be reduced to roughage form of stirrup hammer of my construction adapted for making coarse meal or roughage.

The letter A designates the aXle or shaft of a grindervcomprising a suitable casing B, a hopper C, and suitable means such as cutter bar D and perforated cage E mounted in said casing, which means coact with stirrup hammers pivotally mounted on suitable hammer supports carried by said aXle or shaft. These hammer supports preferably consist of disks F keyed to said shaft, the end disks being mounted in recesses in the sides of the casing as shown in Fig. 2, and

Specification of Letters Patent.

1918. Serial No. 235,093.

in grinders having a considerable width, intermediate disks are used as shown in said figure. Through these disks are run hammer rods G, and on these rods are pivoted radial arms H, the outer ends of which are connected by a cross bar of rectangular or other shape in cross section, but having a width several times its thicknessV (suchas 2 by bar steel) and having such lesser dimension radially disposed with regard to the pivot point of the hammer, so that the head will pass through the material being operated on with comparatively little resistance, instead of opposing and beating up said material as would be the case if the head were oppositely disposed. The lesser resistance to passage of the head, and the consequent reduction of power for driving it, has been demonstrated by practical 0peration of such a hammer, and has created a wide demand for this style of stirrup hammer for feed machines reducing to roughage such material as velvet beans and stalk, peas and vines, and corn with cobs, as well as for cutting alfalfa and clover. A lip z' may be formed on the back of the cross bar l to support and protect the rear edge of a sharp cutting plate J secured to said cross bar by rivets or otherwise when it is desired to operate on alfalfa hay, clover, and such material. A hammer without such cutting edge is provided by dispensing with cutter bar el, but the form shown in detail view Fig. 3 is -preferred in such a case.

Thus not only is the air resistance lessened because of the open space next to the shaft, but the horsepower required to run the shaft at a high velocity is likewise much reduced. @n account of this high velocity of rotation, the action of the cross bar in producing roughage or corn stover does not require a cutter bar and in some cases even the cage itself may be dispensed with, and the high angular velocity relied upon to draw in and break down the feed material. In cutting alfalfa hay or clover, the sharp cutting edge with the cutter bar works to best advantage. Gn the other hand in reducing snapped corn, which is ear corn with the husks on, Kefir corn in the head or stalks, bean vine, bean pods, peanuts in the pod or vines and all, a

simpler form of hammer works to better adbar l', and as the cutting blade is not used 7ith this simpler form, the lip t' is dispensed with on the cross bar.

In this Jform of stirrup hammer, whether with a sharp blade or withV a blunt wearing edge on the cross bar, the action upon the entering leed. is to draw it downward and inward and break it up into roughage, instead ot shredding or cutting it` into fine meal. T his stirrup form of hammer likewise has the particular advantage of drawing in the teed, such as corn stalks, from the hopper into the casing, which hopper o'ten has a tendency to clog up and choke; the husks do not accumulate in the hopper when the stirrup form of hammer is use-d.

l claim:

l. In a machine of the character described, a stirrup hammer constituting' a fiattened bar ot a width several times its thickness, and consisting or' a cross bar head having its lesser dimension radially disposedv in order lto present only said lesser dimension to the material being operated upon, and legs formed at each end of said head and having their width in the same direction as the head and thus presenting the lesser dimension of both hea-d and legs to the material operated on, and thereby ada-ptedto pass through, such material with minimum resistance and consequent outlay of power. l

2. In a comminuting machine of the stirrup hammer type, the combination of a casing` havinc` a screen bottom, a hopper, a cut ting bar fixed to the casing below the inlet of the hopper tothe casing, a central driving shatt carrying pivot means eccentric thereto, a slicing blade adapted to move downward close to said cutter bar fixed to the casing, said slicing blade being oi' a length substantiaily equal to that of the rinterior of the casing and having spaced radiuscarms projecting from its ends pivoted to said eccentric pivot means, the slicing blade being relatively wide and thin with its widest surface lying' lin a plane substantially tangential to its general surface ot revolution, and the said radius arms being also relatively thin vwith their widest surfaces occupying radial planes, substantially as described. Y

In testimony whereof have aliixed my signature in the pre-sence of two witnesses. MILTON F. *WILLIAMS iVitnesses V Bessin RYAN, MABEL VILLIAMS. 

